EP 0716738 A4 19960918 - MAGNETIC SYSTEM FOR MEDICAL INSTRUMENT
Title (en)
MAGNETIC SYSTEM FOR MEDICAL INSTRUMENT
Title (de)
MAGNETISCHES SYSTEM FÜR MEDIZINISCHE INSTRUMENTE
Title (fr)
SYSTEME MAGNETIQUE POUR INSTRUMENT MEDICAL
Publication
Application
Priority
- US 9409427 W 19940818
- US 11489693 A 19930831
Abstract (en)
[origin: WO9506869A1] An instrument (100) monitors the coagulation of coagulable fluid blood, blood fraction or a control (514) by combining (101) the coagulable fluid (514) with particles which are affected by a magnetic field so that the particles become suspended relatively freely in the fluid. A time-varying magnetic field (2 Hz) causes the particles to be reoriented as the magnetic field varies. The reorientation changes as the fluid (514) coagulates owing to the fluid's (514's) changing viscosity. An electromagnet (140) creates the time-varying magnetic field. The electromagnet (140) includes a core (150) comprising a first leg (148), an electrically conductive coil (144) for creating a time-varying magnetic flux in the core (150), and a return (152) for the time-varying magnetic flux. The first leg (148) and the flux return (152) together comprise a generally E-shaped core (150) of ferromagnetic material. A bobbin (146) is provided on the first leg (148) and the electrically conductive coil (144) is wound on the bobbin (146).
IPC 1-7
IPC 8 full level
G01N 33/86 (2006.01); G01N 11/10 (2006.01); G01N 11/16 (2006.01); G01N 27/74 (2006.01); G01N 33/49 (2006.01)
CPC (source: EP US)
G01N 11/16 (2013.01 - EP US); G01N 33/4905 (2013.01 - EP US)
Citation (search report)
- [Y] WO 8910788 A1 19891116 - CARDIOVASCULAR DIAGNOSTICS INC [US]
- [Y] US 4427940 A 19840124 - HIRAMA YUTAKA [JP], et al
- [Y] PATENT ABSTRACTS OF JAPAN vol. 5, no. 120 (C - 065) 4 August 1981 (1981-08-04)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 9506869 A1 19950309; CA 2170043 A1 19950309; CA 2170043 C 20031209; DE 69434531 D1 20051208; DE 69434531 T2 20060720; EP 0716738 A1 19960619; EP 0716738 A4 19960918; EP 0716738 B1 20051102; ES 2253738 T3 20060601; JP H09503052 A 19970325; US 5841023 A 19981124
DOCDB simple family (application)
US 9409427 W 19940818; CA 2170043 A 19940818; DE 69434531 T 19940818; EP 94925970 A 19940818; ES 94925970 T 19940818; JP 50815695 A 19940818; US 11489693 A 19930831